I am going to have to try this. I have heard about it before, but thought I shouldn't need it since I have several different ways to get 1/4", including 1/4" foot.
Last night I was sewing again, and AGAIN didn't sew a consistent 1/4" seam. I was so frustrated.
Your post is a reminder to me, and I'm going to go this route next time I sit down at the machine. Thanks!